Game for Scrabble Practice

I'm absolutely terrible at unscrambling words. I don't know why - I'm a good speller. But I just cannot see it when the letters are mixed up. This is bad news when I try to play Scrabble. And my wife's grandmother is coming into town soon. She loves to play Scrabble. And I look like an idiot with nothing but three letter words.

So my question is - does anyone know of a word puzzle game that could help me get some practice with this? I've searched versiontracker and macupdate for a few things but haven't found anything so far.

I'd be happy with something that just gives you a bunch of mixed up letters and asks you to put them in order, but anything along those lines will work. Free works best too!

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